Rates of Change Questions (1 Viewer)

[Scimat]

Hey can anyone help with these two questions. Part b for question 14 and question 15

 

[cossine]

Hey can anyone help with these two questions. Part b for question 14 and question 15

View attachment 37041

Give the questions a go first. With your working out present.

 

[ZakaryJayNicholls]

These are from the current iteration of the HSC Cambridge math books I believe; they are great questions.

Try thinking of the vertical cross sections of both shapes (this kind of thinking will work for both 14 and 15).

You may then be able to use basic trigonometry or Pythagoras theorem to construct the functions needed.

I hope this helps.